Rolling-mill



1 (No Model.) I 4 SheetsSheet 1'. 1 J. HEMPI-IILL & J. PAWELL.

ROLLING MILL.

No. 431,261. Patented July 1, 1890.

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WITNESSES:

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J. HEMPHILL & J. FAWE'LL. ROLLING MILL.

No. 431,261. Patented July 1, 1890.

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T L I M G N I L L 0 R .L 6 Z 1 no 4 0 N Patented July 1', 1890.

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WITNESSES:

UNITED STATES- PATENT OFFICE.

. JAMES HEMPHILL AND J OSFIIII FAWELL, OF PITTSBURG, PENNSYLVANIA.

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 431,261, dated July 1,1890. Application filed April 9, 1890. Serial No. 847,217. (No model.)

To all whom it may concern:

Be it known that'we, JAMEs HEMPHILL, a citizen of the United States, andJOSEPH FAWELL, a subject of the Queen 'of Great Britain, residing atPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented or discovered certain new and useful Improvements inRolling-Mills, of whichimprovements the following is a specification.

In Letters Patent No. 382,035, granted to us May 1, 1888, we havedescribed certain improvements in universal mills, whereby provision ismade for reversing the operation of the mill by the shifting of a rollintermediate of two constantly-rotating rolls.

The invention described herein relates to further improvements inuniversal mills, such improvements having for their objects a construction whereby more effective driving mechanism may be employed,which shall also be readily accessible, the employment of a moreeffective means for holding the intermediate rolls in contact with thedrivin g-rolls, and certain other mechanical features, each contributingin increasing the effectiveness of the mill.

In general terms, the invention consists in the construction andcombination of mechanical devices or elements, all as more fullyhereinafter described and claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a view, partly in elevation and partly in section, of aportion of a universal mill, showing the arrangement of the driving andintermediate rolls. Figs. 2 and 3 are similar views showingmodifications in the means employed for adjusting the rolls. Fig. 4. isa sectional view 011 the line 00 a, Fig. 1. Fig. 5 is a sectional detailshowing the arrangement of the journal-boxes and the bolts connectingthem with the roll-adjusting mechanism. Figs. 6, 7, and 8 are sectionaldetails showing difierent modifications of the means employed forholding the intermediate rolls in contact with the driving-rolls.

The horizontal beams 3 and l, forming the guides "for the vertical-rollsA, B, O, and D,

are held inposition, as described and shown in the Letters Patentreferred to. Each of the beams consists of two parts or members providedwith ribs 5 and 6 on their inner and secured the beveled pinions 10,with which corresponding pinions 11 on the horizontal driving-shaft 12engage. The shaft 12 is provided with a longitudinal rib or ribs 13,adapted to engage corresponding grooves in the hubs of the pinions 11,thereby causing the pinions to rotate with the shaft, while free to movealong the same. The pinions 11 are moved along the shaft by the pinions10, through the medium. of semicircular ribs 14, engaging grooves 15,formed in the hubs of the pinions 10, said ribs being formed on one partof sleeves 16, surrounding the hubs of the pinions 11.

The journal-boxes of the driving-rolls A and B are bolted to theadjustable crossheads 17, which are held against the ends of theadjusting-screws 18, by weights attached to wire ropes 19, having theirinner ends secured to the journal-boxes 8 of the intermediate rolls 0and D, said ropes passing through suitable holes in the cross-heads andhousings 20 and over guide-pulleys 21, saidweights also serving to holdthe intermediate rolls in contact with the driving-rolls A and B. Inlieu of the weights, it is preferred to hold the crossheads 17 againstthe ends of the screws 18 by means of fluidpressure cylinders 22,arranged on the housings 20, as shown in Fig. 2. On the outer ends ofthe pistons 32 of thecylinders 22 are secured frames 28, to which areattached rods 2.), having their inner ends connected to the boxes of theintermediate rolls, whereby said cylinders are adapted for holding theintermediate rolls against the drivingrolls and the cross-heads againstthe ends of the adj misting-screws. The adjustingscrews 18 pass throughnut-s 23, arranged in the housings 20, and on their outer ends areplaced pinions 24, which are provided with keys or feathers engaginglongitudinal grooves in the screws, thus permitting the latter to movethrough the pinions while rotating therewith. One .of the pinions 24 ateach end of the mill is driven by any suitably-arranged mechanism, andmotion is transmitted therefrom to the other pinions by idlers25,loosely mounted on suitable pins or journals. 7

In lieu of either of the constructions hereinbefore described, it ispreferred to employ independent fluid-pressure cylinders for holdin gtheintermediate rolls against the drivingrolls and for holding thecross-heads against the adjusting-screws, as shown in Fig. 3. To thisend fluid-pressure cylinders 26, provided with pistons 27, are securedto the cross-heads 17, and on the outer ends of the pistons are mountedthe frames or spiders 28, to which are attached bolts 29, passingloosely through the cross-head and journal-boxes 7 and secured to thejournal-boxes 8 of the rolls 0 and D. On the admission of fluid-pressureinto the cylinders 26 the spiders or frames will be forced outwardly,thereby drawing the rolls 0 and D tightly against the driving-rolls Aand B. The spider or frame 28 is so mounted on the piston 27 as to becapable of a slight rocking movement, for the purpose of equaling itsaction in case one of the bolts 29 is tightened up more than the others,or of the passage of scale or other substance between the driving anddriven rolls. In lieu of such construction, the holes formed in thecrosshead for the bolts 29 may be enlarged for a portion of theirlengths, and plugs or blocks 30, having axial openings for the bolts 29,placed therein, as shown in Fig. 6. These plugs or blocks are surroundedby suitable stuffing-boxes 31, and have the bolts 29 secured thereto,and serve in all respects as pistons, the bolts 29 forming thepiston-rods. At the inner ends of the cylinders 26, formed by enlargingthe holes for the bolts 29, are placed cup-shaped packing-rings 33,which surround the bolts 29 and prevent the escape of fluidpressure, anda suitablepacking 34 is placed around the bolts at the outer ends of thepistons for the same purpose. inders 26 are connected at a common pointof convergence by passages 35 to a common supply of fluid-pressure forthe purpose of insuring an equal fluid-pressure in each cyl inder.

In lieu of either of the constructions described for maintaining theintermediate rolls in contact with the driving-rolls, it is preferred toform a single fluid-pressure cylinder 26 at each end of the cross-heads17 as shown in Fig. 7, and intermediate of the bolts 29, as shown inFig. 8. An equalizing-lever 42 is connected to the outer ends of thebolts 29 and has a pivotal bearing upon the piston 27. The cylinders 26are connected by passages 35, leading from the point of connection ofthe piston-rod 37', with the cross-heads.

In the construction shown in Fig. 3 the pistons 32 of the cylinders 22are connected by hollow piston-rods 37 to the pistons 27 of thecylinders 26,thepistons 27 being provided with shoulders 38, adapted toengage the frames or spiders 28, and through the medium of the bolts 29draw theintermediate rolls against the driving-rolls and the cross-headsagainst the The several cylends, of the adj UStID -SCIGWS. The pistons27 have passages 39 therethrough communicating with the hollowpiston-rods 37, so that whatever fluid-pressure is admitted to thecylinders 22 is conducted by the piston-rods 37 and passages 39 to thecylinders 26, the piston-rods being provided with a port 40, so locatedwith reference to the movements of the pistons 32 as to be constantlywithin the cylinders 22.

WVhere the constructions shown in Figs. 6 and 7 are employed thepiston-rods 37 are connected directly to the cross-heads 17, as shown inFig. 7, and the passages 35 are in communication with the openingthrough the pistonrods.

In the constructions hereinbefore described the entire movements of therolls are controlled by the adj usting-screws, the drivingrolls or thecross-heads being yieldingly held against the ends of the screws and theintermediate or driven rolls similarly held against the driving-rolls.As shown in Fig. 3, itis preferred to form longitudinal openings throughthe rolls for the purpose of providing a receptacle for oil, which isconducted to the points of desired application by inclined passages. Theupper and lower ends of the longitudinal openings in the rolls areclosed by plugs screwing thereinto, the plugs closing the upper endsbeing provided with eyes, whereby the rolls may be lifted when it isdesired to remove them from the mill. The employment of the rolls 0 D,which are driven by frictional contact with the rolls A and B, permitsof such a separation of the driving-rolls that large bevel-pinions canbe employed on the driving-rolls, thereby increasing the effective powertransmitted to the rolls A and B. If desired, the intermediate rolls maybe driven through the medium of spur-wheels or pinions keyed to thenecks on the lower ends of the rolls, the necks being extendedfor thereception of the pinions, as shown in Fig. 1; or the upper necks may beextended and the pinions secured thereon, as shown in Fig. 2; or pinionsmay be employed at both ends of the rolls.

WVe claim herein as our invention- 1. In a universal mill, thecombination of two positively-driven vertical rolls, two intermediaterolls, and fluid-pressure cylinders for holding the intermediate rollsin frictional contact with the driving-rolls and movable with saidrolls, substantially as set forth.

2. In a universal mill, the combination of two positively-drivenvertical rolls, two intermediate rolls, cross-heads movable with thepositively-driven rolls, fluid-pressure cylinders arranged on thecross-heads and connected to the intermediate rolls, adjustingscrewshaving a bearing against the crossheads, and fluid-pressure cylindersfor holding the cross-heads against the adjustingscrews, substantiallyas set forth.

3. In a universal mill, the combination of two positively-driven rolls,two intermediate rolls, cross-heads movable with the positively IIOconnected to the cross-head, the cylinders 22 being connected to theother cylinders, whereby an equal pressure is maintained in all thecylinders, substantially as set forth.

In testimony whereof we have hereunto set our hands.

JAMES HEMPHILL.

JOSEPH FAWELL.

Witnesses:

DARWIN S. WoLoo'rT, R. H. WHITTLEsEY.

